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| 不同产地油茶籽脂肪酸及甘油三酯的主成分分析和聚类分析 |
| Principal component analysis and cluster analysis of fatty acids and triglycerides in oil-tea camellia seeds from different origins |
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| DOI： |
| 中文关键词: 产地 油茶籽 脂肪酸 甘油三酯 主成分分析 聚类分析 |
| 英文关键词:origin oil-tea camellia seed fatty acid triglyceride principal component analysis cluster analysis |
| 基金项目:林业和草原科技成果国家级推广项目（2020133148）；浙江省林业科研成果推广项目（2020B05） |
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| 中文摘要: |
| 开展了不同产地对油茶籽油脂肪酸和甘油三酯的影响研究。采用气相色谱法和高效液相色谱法，分别对我国47个产地的108份普通油茶籽样品的脂肪酸和甘油三酯组成及含量进行检测，并对其进行主成分分析和聚类分析。结果表明：从47个产地的108份油茶籽样品中共检测出10种脂肪酸，其中以油酸的含量最高，平均相对含量达79.86%，不同产地样品的脂肪酸中饱和脂肪酸含量差异显著（P＜0.05），不饱和脂肪酸含量差异不显著（P＞0.05），除海南省5个产地外，其余各个产地样品中油酸含量差异不显著；主成分分析结果显示，油酸、亚油酸、棕榈酸和硬脂酸是油茶籽油的特征脂肪酸；油茶籽中的甘油三酯包括12种组分，其中OOO含量最高，其次是POO和OOL，LLL和PPL含量最低；主成分分析结果显示，POO、SOO、SOP、PPO、POL+SLL、OOO是油茶籽油的特征甘油三酯成分；在主成分分析的基础上，以含量在1%以上的甘油三酯组分作为评价指标，对油茶籽油样品进行了聚类分析，将其划分为2类，第一类42个产地，第二类5个产地均属于海南省。该研究为我国普通油茶的鉴别分类和加工利用提供了理论依据和参考信息。 |
| 英文摘要: |
| Studies on the effects of different origins on fatty acids and triglycerides in oil-tea camellia seed were carried out.The fatty acid and triglyceride composition and content of 108 common oil-tea camellia seed samples from 47 origins in China were examined by gas chromatography and high performance liquid chromatography, respectively, and subjected to principal component analysis and cluster analysis.The results showed that ten kinds of fatty acids were contained in all the 108 samples, in which the oleic acid had the highest average relative content of 79.86%,the difference of the saturated fatty acid content among all samples was significant (P<0.05), meanwhile, there was no significant difference in the unsaturated fatty acid content among different origins. There was no obvious difference in the oleic acid content of samples from origins except for five regions in Hainan province. The results of principal component analysis showed that oleic acid, linoleic acid, palmitic acid and stearic acid were the characteristic fatty acids of oil-tea camellia seed oil. 12 triglyceride components were identified in oil-tea camellia seed, among them OOO was the most, followed by POO and OOL, LLL and PPL content were the lowest. The principal component analysis showed that POO, SOO, SOP, PPO, POL+SLL and OOO were the characteristic triglyceride of oil-tea camellia seed oil. On the basis of principal component analysis, triglyceride with an average content of more than 1% from 47 origin samples were conducted by cluster analysis. The results showed that all the oil-tea camellia seed oil samples could be divided into two categories, the first category included 42 origins and the second category included 5 origins in Hainan province. The study provided theoretical basis and reference information for the identification, classification, processing and utilization of oil-tea camellia in China. |
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